Home / 785.15-1,176.59-433

Finding the Fourth Proportional to 785.15, 1,176.59 and 433

Calculator

Solution

The fourth proportional to 785.15, 1,176.59 and 433 is: 648.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.15 : 1,176.59 = 433 : x
  2. Step 2: Convert to fraction form
    785.15/1,176.59 = 433/x
  3. Step 3: Cross multiply
    785.15x = 1,176.59 × 433
  4. Step 4: Simplify right side
    785.15x = 509,463.47
  5. Step 5: Solve for x
    x = 509,463.47/785.15
  6. Step 6: Final answer
    x = 648.87

Related Problems

Find fourth proportional to 392.58, 588.30 and 216.50
Half scale
Find fourth proportional to 1,570.30, 2,353.18 and 866
Double scale
Find fourth proportional to 786.15, 1,178.09 and 434
Similar ratio
Find fourth proportional to 1,177.73, 1,764.89 and 649.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.